Machine for sawing metals.



No. 870,180. PATENTED NOV. 5, 1907. C. A. JUENGST.

MACHINE FOR SAWING METALS.

APPLIOATION HLED MAR. 9, 1905.

TINTTTD STATES PATENT OTTTQTE.

GHAIRLES. IUENGS'L OF CROTON FALLS, NEW YORK, ASSIGNORTO HIGLEY MACHINE COMPANY, OF CROTON FALLS,V NEW YORK, A CORPORATION yOF NEW YORK.

MACHINE FOR SAWING iVETALs.

Specification of Letters Patent.

Patentes Nov.` o, roo?.

Application filed March 9, 1905. Serial Nm 249.177.

to the work lnd an after feed maintained for progressively advancing the saw through the Work and the saw and frame thereafter returned to an initial position. My invention is an improvement upon and addition to the devices shown and described in" Letters Patent No 864,424, granted to me August 27, i907. In this class of metal sawing machines the gravity return'f the saw and saw frame to an initial position has usually f been more rapidand the arrested movement moresud-` den than was-desirable, and this was liablefbecause of the Weight of the parts, to ca injury thereto.

-The object of my invention'is to reduce to' a minimum the' liability to injury by effecting a slow return. In carrying out my invention I provide devices which run freely with the rotary feed movement for the saw and saw frame, which run continuously while the machine is in operation and always with the same direction of movement, and (zo-actingl devices brought into evidence upon the release of the feed engaging devices at the end of the cut, and which co-acting de- .vices are in direct connectionwith part of the feeding mechanism to receive the downward thrust of the moving saw frame and saw and gradually lower the sarde to an initial position.

In the drawing, Figure l is a side elevation showing the saw frame and saw and part of the feeding devices. ifig. 2 is a vertical central section and elevationlongitudinally of the frame and parts of the machine showing the features of my improvement, and Fig. 3 is a plan and partialhorizontal section of the devices shown in Fig-'2 and particularly of those that come outside of the frame. Figs. 2 and 3 are in larger size for clearness. The devices shown and described in my aforesaid patent., and which, for the purpose of an operative structure are shown herein comprise the following:

The frame a of the machines comprises sides, ends and a top or bed. At one end of this frame there are bearings v2 for the power shaft b. On the power shaft b is a pinion b and adjacent to the end of this shaft there is a pulley bz; a gear c isnin mesh with the pinion b and the same is secured upon the shaft d Whichpasses across through the machine in suitable bearings provdedtherefor. On this shaft d is a gear c inr mesh with the gear lc2 ona shaft d/ located above the shaft all in a plane parallel therewith and also in suitable bearl Table bearings of the frame of the machine in the end opposite to the portion containing the shafts d, d.

vnormally supporting the bridge frame in an elevated ings in the frame ofthe machine. The saw frame f is suitably mounted to swing upon the shaft d. i

g is a bevel Wheel on a shaft h through which the power and rotation of the shaft d/ are communicated to the saw, the shaft being provided with bearings 5,

' 6 in the saw frame, the saw i being mounted upon an arbor if in abearing 7 `offthe saw frame. The edge of the lsaw frame f distant from itsy connection with the shaft d/ is provided with a toothed segment f covered and protected by a casing f2 secured to the frame of the machine,-and a shaft Ic passes through suit- Upon the shaft lc there is a 'pinion h in mesh with the toothed segment f f of the saw frame and a hub h2 on vthe outer end, which hub is provided with a handle b3 by which the said shaft 7c may be rotated with the pin- 70 ion h so as to raise the saw and saw frame up to the Work. On the shaft lc there is also a Worm-wheel k and a hub k3 on the opposite end, to which hub is connected one end of the chain 8.

In a'bearing in the frame of the machine there is o. 75

, short shaft l on the outer end of which isla handle l. to

which is secured the other end of the chain 8, while on `the innerend of the shaft Z there is a hook device l2.

A bridge frame comprises a central longitudinal portion m and yoke end m. This is preferably an integral structure, the central portion having bearings for a shaft n' and the yoke end having bearings for a short shaft 10, the respective ends of which shaft are in bearings in the machine frame. In connectionwitnthis bridge frame I employ a spring 'mz at one end secured to the yoke portion `of the frame and at thev other end adapted to bear upon a bracket of the machine frame as shown in Inf/aforesaid patent, said spring and bracket position. l

On the short shaft 10there is a gear l1 meshing with -tbe gear c2, the movement being communicated from its pin 18, the trunnions or pins 16, rod 21,;piv`ot grip device 24 and rod 25, a segment rack u, levert and; the gear case a2 parte shown and described in the'aforesaid patent and herein shown in the drawing in whole 'Y or `in part, have thesamev function as similar parts in the aforesaid patent and do not require further descrip 1 tion.

'l`he essential parts of my present invention comprise a sprocket e on the shaft, d, a larger sprocket s on the shaft k, a chain o passing around the sprockets e, s and communicating power and movement from the shaft d and sprocket c to the sprocket s, the sprocket c being fast upon the shaft d, and the sprocket s loose upon the shaft lc. Fast upon the shaft lc is a ratchet w and secured to the face of the sprocket s adjacent to the ratchet w is a paWl 30 engaging said ratchet and held in such engagement by the spring 31, which spring is also secured to the faceof the sprocket.

In the operation of the device the hand of the' operator first engages the handle h3, turns the shaft c and the pinion h to raise the toothed segment f the saw frame and saw up to the Work, after which the operator moves down bridge frame by the handle n2 and connects the same with the hook device l2, simultaneously coupling the worm k2 and the worm Wheel k/ so as to communicate the power of the shaft n through the Worm k2 and worm Wheel lc to the shaft c, pinion h and toothed-segment f to continue the rising vmovement of the saw frame and saw as the saw progresses Ithrough the work. During this movement of feeding the saw through the work the sprockets c, s and chain 'v have been continuously running and at a speed in excess of thespeed of rotation of the shaft k, consequently the pawl 30 l ls been running free around the ratchet w, because of the fact that the sprocket s is loose upon the shaft k. As soon asithe saw has passed through the Work the same and the saw frame are to be returned to au initial position, and to effect this movement the hub k3, which has been previously set according to the thickness of the Work operated upon, acts with the rotation of the shaft lc during the cutting operation upon the chain 8 to -wind said chain about the free end of the shaft k and when drawn taut to pull down the handle l connected to the chain and in so doing to disconnect the hook l2 from engagement with the pin 15. This permits the spring m2 to come in evidence and raise the bridge frame m and shaft n and disconnect the Worm k2 from the worin-wheel k', stopping the further progress of the feeding movement, but at the same time releasing the saw and saw frame so that its weight comes into evidence to return the same to its initial position. The moment that this weight comes into evidence the movement of the toothed-segment f and pinion h are in the opposite direction: this opposite direction at once causes the ratchet w and pawl 30 to lock, and the shaft k through the ratchet w and pawl 30 to be connected to the sprockets, chain o and sprocket e back to the shaft d, thus supporting the weight of the saw and saw frame and lowering the same progressively with the movement of the said sprockets and chain, so that the saw and frame gradually return to an initial position instead of suddenly returning 'by a gravity action alone. The devices lor effecting this` gradual return instead of the gravity return, are few in number and exceedingly simple, and they may be applied te the machine of my aforesaid patent or4 to other similarl machines for effecting the same function.

l claim as my invention:`

l. In a metal sawing machine, the combination with a gravity moving saw frame and saw and the Saw feed engaging, operating and reieasingrlevices, of devices which upon the reir-.rse of the feeding; and operating devices auton.:\li :\l|\ como into o'iijsdcoineui with and liold the gravA ity movin;r saw and` saw frame and gradually return the same toan initial' position.l f

2. In a metal sawing machine, the combination with a gravity moving saw frame and saw, a shaft, al pinion and a toothed-segment, and means for turning the said shaft to raise. the. saw frame and the saw to Aand progress the sametlnoirgli the work, of devices which upon the release of the feedingrv devices lautormiticallyl come into engagement with the' said'shift and hold 'the gravity moving saw and saw frame andgraduaily return 'the same to an initial position.V

3. In a metal sawing machine, the combination. with a gravity moving saw frame and saw, a shaft, a pinion and a toothed-segment, and means for turning the said shaft to raise the saw frame andV the saw to and progress the 'same through the work, 0f devices associated with the said shaft and with a power shaft of the machine normally running free but nought into evidence upon the release of the feed and operating devices to automatically comel into engagement with and hold the grafv'ity moving saw frame and saw and gradually returnv thesame to an initial position.

4. In a metal sawing machine, the combination with a gravity moving saw'frame and saw, a shaft, a pinion and a toothed-segment, and means for turning the said shaft to raise the saw frame and the saw to and progress the same through the work, of asprocket loose upon said shaft, a sprocket upon a power shaft of the machine, a chain passing around and connecting the two sprockets' and shafts, a ratchet fast upon the aforesaid shaft, a spring controlled pawl fast upon the loose sprocket and engaging the teeth of the fast ratchet, said parts being adapted for engagement upon the release of the feeding and operating devices so as to automatically engage and hold the gravity moving saw frame and saw :1nd permit the saine to return to an initial position at a speed controlled by the movement of said sprockets and chain.

5. In a metal sawing machine, the combination with the pivotally mounted saw frame and saw, a toothed segment on said saw frame, a revoluble shaft, a pinion thereon meshing with the toothed-segment, a toothed wheel also on said shaft, and means for engaging said toothed wheel to rotate the same and said shaft and progressively feed the saw through the work, and means for disengaging the aforesaid feeding devices at the end of the cut, of devices co-acting with said shaft and with a` power shaft of the machine and acting upon the release of the feeding devices to engage and hold the said revoluble shaft, pinion, segmental gear and the saw frame and saw and permit the saw frame and saw to return gradually to an initial posi tion.

.6. In a metal sawing machine, the combination with the vpivotally mounted saw frame and saw, a toothed-segment on said saw frame, a rcvoluhle shaft, a pinion thereon meshing with the toothed-segment, a toothed-wheel also on said'shaft, and means for engaging said toothed-wheel ,torotate the same and said shaft and progressively feedv the saw through the work, and means for disengaging the aforesaid means at the end of the cut, of a ratchet fast upon said shaft, a sprocket loose upon said shaft, a pawl on the face of said sprocket adjacent 'to and engaging the teeth of the ratchet, a spring for holding the pawl in engagement with the ratchet, -a sprocket on a power or primemover shaft of the machine, and a chain passing around the sprockets,l said sprockets and chain running free with the machine in the advancing movement of the saw and frame, and actingrupon thc reverse movement of the saw frame and saw and upon the release o f the feeding devices to bring the pawl and ratchet into engagement and support the saw frame and saw by the said shaft and permit the same to. gradually return to an initial position with the rotation of said shaft. v,

7. In a metal sawing machine, the combination with a gravity moving saw frame and saw, a shaft, apinion and toothed segment and means for turning `said shaft in' one direction to raise the saw frame and the saw to an proA gress the saine through the work, of devices connecting snldsinii't with a power shaft of' the niacliinc and which deA vices are adapted to rotate in a direction the opposite to the first aforesaid shaft, devices for releasing the feeding sind operating devices and other devices nntoinatialiy-i nutomaticaily engaging uippxi the Weies@ @if We feedingnmiengaging upon the release of the feeding and operating nperatingdevices :to bold the gravity moving new freine devices to hold the gravity moving saw frame and suiv and saw ond permit the ming to setup! toon iiliiali 908iand permit tlie same to return to an initui position. tion. p

5 8. In a metal sowing machine, the combination with a 'Signed by me thisoitii day o 4MmciiE'flzi'.

lgravity moving saw frame 31 d sam-and the saw feed enj i y gaging operating and reieasg devices, lo' devices conneet- C A' mu'ms' ing the latter devices vvith a power shaft of the machine Y Wlfness:

. and which devices x11-e adapted to rotate in a diiec'tion the V Gm, T. PINCKNEY,

10. oppos'ite to the second a'foresnid devices, and other deviges k S. T, Hiwumiix'` 

